The Aramaic verb besh (בְּאֵשׁ) means to be bad, evil, or displeasing. It appears in the Aramaic portions of Daniel and is the equivalent of the Hebrew ra'a (H7489). The term is used to describe that which is evil, displeasing, or morally bad in character or outcome.
In Daniel 6:14, the word describes King Darius's deep displeasure when he realized Daniel had been trapped by the conspirators' law — he was greatly distressed and set his heart on rescuing Daniel. The passage illustrates how even pagan rulers could recognize righteous injustice and desire to correct it. Theologically, God's redemption of Daniel despite the king's inability to reverse his own law prefigures the Gospel: what the Law cannot fix, God's grace accomplishes. The evil of human schemes cannot thwart God's purposes for the righteous.